Editions of When Giants Walked the Earth

520 pages

Published Oct. 30, 2008 by Orion (an Imprint of The Orion Publishing Group Ltd ).

544 pages

English language

Published April 23, 2009 by Orion Publishing Group, Limited.

560 pages

English language

Published April 23, 2019 by St. Martin's Press.

608 pages

English language

Published April 23, 2019 by Orion Publishing Group, Limited.

608 pages

English language

Published April 23, 2019 by Orion Publishing Group, Limited.